Functional efficiency assessment of the water curtain system in an underground water-sealed oil storage cavern based on time-series monitoring data

Shi, Lei; Zhang, Bin; Wang, Lei; Wang, Hanxun; Zhang, Huijie

doi:10.1016/j.enggeo.2018.03.015

Cited by 42 publications

(8 citation statements)

References 46 publications

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“…Same was confirmed by [41] during the seepage, stability and deformation analysis using FLAC3D software of the Xigouwan landslide. According to in situ monitoring and computational modeling, Shi et al (2018) [42] discovered that both rainfall and FRWL had a substantial impact on the action of the Quchi reactivated landslide; FRWL destabilized (b) rock masses at the landslide toe, while rainfall primarily mobilized materials in the rear part. According to our findings, the drawdown severely deforms the front portion of Zhulinwan landslide, while precipitation has some impact on the rear part.…”

Section: Discussionmentioning

confidence: 99%

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Shoaib

Yang

et al. 2021

Civ Eng J

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Landslides, a devastating hazard, continue to happen, affecting the lives of thousands of people each year. Fluctuation in the Reservoir Water Level (FRWL) is one of the leading features disturbing the slope stability in reservoir areas, drawdown is more crucial than the rise to the stability of landslide. Latest studies grounded on field investigation and monitoring data propose that landslides in reservoir areas are initiated not solely by one issue like precipitation or FRWL, however conjointly by their joint actions. Zhulinwan landslide in Chongqing, China, Three Gorges Reservoir (TGR) area was analyzed by field investigation and numerical modelling to evaluate the characteristics of the landslide. The changes in landslide stability and deformation under the effect of reservoir drawdown and rainfall is analyzed using GEOSLOPE Software. The seepage analysis is done using SEEP W Model, afterward deformation and stability analysis using SLOPE W and SIGMA W respectively. The analysis confirmed that the coupling effect of reservoir drawdown at 1.2 m/d and rainstorm of once in 50 years return period makes the landslide unstable. Moreover, deformation at the same condition is maximum 0.049 m. The findings may be used by local authorities to help make decisions about slope stabilization in the event of a confirmed significant rainfall event. Doi: 10.28991/cej-2021-03091713 Full Text: PDF

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Section: Discussionmentioning

confidence: 99%

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Shoaib

Yang

et al. 2021

Civ Eng J

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“…These datasets provided a strong basis for exploring the spatial variability of seepage characteristics of the surrounding rock at the site. geological structure map and location of boreholes (adapted from [28] and (b) sketch map of the study project The 792 hydraulic conductivity samples extracted from the boreholes were used to produce a frequency histogram, as shown in Fig. 4.…”

Section: Spatial Variability Of Seepage Characteristics 31 Hydraulic ...mentioning

confidence: 99%

Probabilistic analysis of water-sealed performance in underground oil storage considering spatial variability of hydraulic conductivity

Zhang

et al. 2022

Preprint

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For underground water-sealed oil storage, the spatial variability of the surrounding rock has a significant impact on the water-sealed effect of a water curtain system. This study presents a methodology for the probabilistic analysis of water curtain performance in underground oil storage, considering the spatial variability of hydraulic conductivity of the surrounding rock based on field data. Anisotropic random fields representing the spatial variability of hydraulic conductivity were established through spatial statistical analysis of field data and introduced into the finite element model of underground oil storage for water-sealed reliability analysis. The water-sealed performance of different water curtain system schemes was studied using Monte Carlo simulation (MCS). The results showed that the difference between the horizontal spatial correlation and the vertical spatial correlation of the surrounding rock has a significant impact on the water-sealed effect of the water curtain system. An excessively large pressure of water curtain boreholes provided a small contribution to improving water curtain performance. The distance between the water curtain holes and the caverns has the less significant affecting the water-sealed reliability of the storage cavern. Finally, the optimal design of the water curtain system is discussed. This study provides valuable insights and a theoretical basis for the optimisation of water curtain system design parameters for underground water-sealed oil storage.

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“…The basic principle of underground oil storage in unlined rock caverns is that the groundwater pressure surrounding the caverns should be higher than the storage cavern pressure, and the groundwater should flow into caverns to prevent oil leakages (Hassanpour et al., 2019; Lin et al., 2016). The water-sealing effect and rock mass stability are two key scientific problems for the construction of underground water-sealed oil storage caverns (Shi et al., 2018; Zhuang et al., 2017), especially the relation between rock mass stability and the caverns’ stability.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of underground water-sealed oil storage caverns in China：A case study

Xingdong

Deng

Zhang

2020

Energy Exploration & Exploitation

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The stability of underground water-sealed oil storage caverns is of great importance for safe excavation and operation. To analyze the scope of the failure zone and underground cavern stability accurately, a new method was developed that integrates the rock tunneling quality index Q-system and stability graph method with 3D laser scanning and numerical simulation. The point cloud data were obtained by 3D laser scanning, and the cavern model was built by using DIMINE software, which directly shows the 3D shape of the cavern. The rock mass physical and mechanical parameters and the corresponding stability coefficients were obtained based on Q-system and stability graph method. The plastic zone distribution and deformation characteristics of surrounding rock were analyzed through numerical simulation. Then, the corresponding relationship between caving zone and plastic zone was determined by comparing the numerical simulation results with the 3D laser scanning contour. The new method provides a reliable way to analyze the stability of the underground water-sealed oil storage cavern and also will helpful to design or optimize the subsequent support.

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Functional efficiency assessment of the water curtain system in an underground water-sealed oil storage cavern based on time-series monitoring data

Cited by 42 publications

References 46 publications

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Probabilistic analysis of water-sealed performance in underground oil storage considering spatial variability of hydraulic conductivity

Stability analysis of underground water-sealed oil storage caverns in China：A case study

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